Our brains see love as a reward and also an addiction. What happens to our brains when we are in love? Can science explain whether love can last? Ask Science explores the heart-brain connection.
Falling in love seems to be a basic part of human nature. It’s universal—we all know what love is even if we have a hard time defining it or detailing its complexities. And love transcends cultural and societal differences: in a historical study of 166 societies, anthropologist Helen Fisher found evidence that feelings of love existed in 147 of them. Thus, it appears we are not taught that love is important to us, but rather may be born knowing it.
But anyone who has ever been in love knows that love is complicated. Being in love can calm you down but it can also make you anxious. In our attempts to understand how the human brain works, neuroscientists have studied for decades what the complex mix of emotions we call love does to our brain. Can love cause us to lose focus? Is being in love addicting? And can science weigh in on the question of whether or not love can last?
Let's find out today.
Our Brains See Love as a Reward
In a 2005 study, researchers compared functional MRI images of the brains of 2,500 college students while looking at someone they love relative to looking at an acquaintance. Scientists were thus able to map which regions of the brain are active when a person is experiencing feelings of love. They saw the most activity in two regions associated with seeking and detecting rewards, namely the caudate nucleus and the ventral tegmental area. These regions are also responsible for an increased production of dopamine, the feel-good neurotransmitter. Neurotransmitters are chemicals that pass information from one neuron to the next. In the case of dopamine, that information is a signal to the brain that the person is feeling happy and finds the current activity rewarding.
Love Can Be Addicting
The increase in dopamine levels can act as a high or even inspire a state of euphoria when around the object of affection. In an effort to continue that lover’s high, you may find yourself wanting to be around the other person all of the time.
The part of our brain that processes attraction, often a precursor to love, is known as the opioid center and is, as you may have guessed, the same region responsible for our response to certain addictive substances including opioids like morphine. For example, in one, albeit smaller, study, a group of 30 men were given either small doses of morphine or a dose of an opioid suppressor. Those given the opioid rated attractive faces more highly and spent more time looking at them, suggesting that our brains can be primed to find others attractive by first stimulating the right region of the brain.
Also running high in love-addled brains are adrenaline, which can make your heart beat faster and your palms sweaty, and vasopressin, which triggers territorial feelings of loyalty and the need to protect. However...